Leveling-rod



UNITED STATES PATENT OFFICE.

JOHN S. MILLIKIN AND WWI-EUGENE BOVEN, OF ONTARIO, OREGON.

LEvr-:LING-Roo.

SPECFI'CATION forming part of Letters Patent No. 624,362, dated May 2,1899.

Application iiled April 22, 1898.

T0 all whom, t may concern.-

Beit known that we, JOHN S. MILLIKIN and WEUGENE BOWEN, of Ontario, inthe county of Malheur and State of Oregon, have invented a new andImproved Leveling-Rod, of which the following -is a full, clear, andexactdescription.

Our improvement relates to leveling-rods, and has for its object toenable differences in elevations between two points to be read directlyon the rod Without any computation.

The invention comprises a rod or support having two endless tapesmounted thereon and capable of adjustment longitudinally, each tapehaving a target attached thereto and having a scale marked thereonreading from zero at the target in each direction.

The invention also-consists of novel features of construction, whichwill be hereinafter described, and particularly pointed out in theclaims.

Reference is to behadto the accompanying drawings, forminga part of thisspecification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure l is a sectional elevation of our device. Fig. 2 is a frontelevation, and Fig. 3 is a side elevation, of the same.

In using the ordinary leveling-rod it is necessary to make a computationfor each elevation taken in order to determine the elevation of thatpoint above and below any particularpoint. In setting stakes for cuttingor filling, which is a common job of leveling, it is necessary to make acomputation at each point to determine the amount of ill or cutnecessary to bring the surface to the proper elevation. With our deviceit is possible to read the exact amount of cut or ill directly'from therod without any computation. In consequence of this the work may be donemore rapidly and with less possibility of mistakes. It is also possiblefor a person to use this rod and to work satisfactorily without havingthe special training and education which is ordinarily necessary indoing this work by the present means.

Our rodconsists of a body A, which is preferably made of wood and of anysuitable length.

This body A is provided with recesses on op- 4 posite sides adapted toreceive the tapes B Serial No. 678,470. (No model.)

and C, so as to keep the outer surface of the tapes below the outeredges of the rod, thus preventing rubbing of the tapes upon any objectand their consequent defaceinent. At each end the body of the rod has ahole cut through it, connecting the opposite sides, within which holeare mounted the rollers Il, which carry the tapes. The tapes areprovided with targets D and E of any usual or preferred construction.The tapes are scaled in each direction from the targets, the targetsbeing placed at zero. It is evident that the tapes and the targetsattached thereto may be readily elevated or depressed, as desired. Inusing our device the target upon one of the tapes will be set tocorrespond with the grade desired. This target and the tape carrying lit will be clamped in place, so it will not be .accidentally moved. The.target upon the other tape will then be set at such an elevation as maybe necessary to bring it in line with the level. As the tape is laid outin each direction from the target at zero, the diierence in elevationbetween the point where the rod is .set and the required grade may beread directly from this tape and will be plus or minus, as the target isbelow or above the target upon the other tape. In this way it may bedetermined at once whether a cut or. iill is necessary and the exactamount of the same. The tapes -B and C maybe made of any suitablematerial, as cloth or metal.

For convenience, Where it is desired to use the rod as an ordinaryleveling-rod, one side edge thereof may be laidV out with the usualscale G and target F. This scale G will be used in the ordinary manner.The flanges or beads a upon each side of the tapes B and O serve toprotect the figures upon the tape from accidental contact with otherbodies and from being in consequence rubbed oi or disigured.Anyconvenient clampingmeans may be used. to secure one or the other ofthe tapes in position-for instance, as shown in Fig. l, a spring I,attached to one of the anges a and bearing uponthe tape. The

use of double tapes, as herein described, enables leveling to be donemore rapidly than possible with an ordinary rod and increases theaccuracy of the work, as well as render- 2. A leveling-rod baving twoindependent1y-movab1e endless tapes located side by side on the sameface of the rod and figured from zero in opposite directions, a targetsecured to each tape at zero, rollers mounted upon each end of the rodand carrying the ltapes, and means for clamping one of the tapes to therod, substantially as described.

JOHN S. MILLIKIN. W EUGENE BOWEN. Witnesses:

U. G. POGUE, W. M. MILLER.

